Replace String.levenshtein_distance/2 with String.jaro_distance/2

lib/elixir/test/elixir/string_test.exs

@@ -517,39 +517,30 @@ defmodule StringTest do
     assert_raise ArgumentError, fn -> String.to_float(three.()) end
   end
 
-  test :levenshtein_distance do
-    # With empty strings
-    assert String.levenshtein_distance(   "",    "") == 0
-    assert String.levenshtein_distance(  "a",    "") == 1
-    assert String.levenshtein_distance(   "",   "a") == 1
-    assert String.levenshtein_distance("abc",    "") == 3
-    assert String.levenshtein_distance(   "", "abc") == 3
-    # With equal strings
-    assert String.levenshtein_distance(  "a",   "a") == 0
-    assert String.levenshtein_distance("abc", "abc") == 0
-    assert String.levenshtein_distance(   "",   "a") == 1
-    # Only with inserts
-    assert String.levenshtein_distance(  "a",  "ab") == 1
-    assert String.levenshtein_distance(  "b",  "ab") == 1
-    assert String.levenshtein_distance( "ac", "abc") == 1
-    assert String.levenshtein_distance("abcdefg", "xabxcdxxefxgx") == 6
-    # Only with deletions
-    assert String.levenshtein_distance(  "a",    "") == 1
-    assert String.levenshtein_distance( "ab",   "a") == 1
-    assert String.levenshtein_distance( "ab",   "b") == 1
-    assert String.levenshtein_distance("abc",  "ac") == 1
-    assert String.levenshtein_distance("xabxcdxxefxgx", "abcdefg") == 6
-    # Only with substitutions
-    assert String.levenshtein_distance(  "a",   "b") == 1
-    assert String.levenshtein_distance( "ab",  "ac") == 1
-    assert String.levenshtein_distance( "ac",  "bc") == 1
-    assert String.levenshtein_distance("abc", "axc") == 1
-    assert String.levenshtein_distance("xabxcdxxefxgx", "1ab2cd34ef5g6") == 6
-    # With different operations
-    assert String.levenshtein_distance("example", "samples") == 3
-    assert String.levenshtein_distance("sturgeon", "urgently") == 6
-    assert String.levenshtein_distance("levenshtein", "frankenstein") == 6
-    assert String.levenshtein_distance("distance", "difference") == 5
-    assert String.levenshtein_distance("erlang was neat", "elixir is great") == 9
+  test :jaro_distance do
+    assert String.jaro_distance("same", "same") == 1.0
+    assert String.jaro_distance("any", "") == 0.0
+    assert String.jaro_distance("", "any") == 0.0
+    assert String.jaro_distance("martha", "marhta") == 0.9444444444444445
+    assert String.jaro_distance("martha", "marhha") == 0.888888888888889
+    assert String.jaro_distance("marhha", "martha") == 0.888888888888889
+    assert String.jaro_distance("dwayne", "duane") == 0.8222222222222223
+    assert String.jaro_distance("dixon", "dicksonx") == 0.7666666666666666
+    assert String.jaro_distance("xdicksonx", "dixon") == 0.7851851851851852
+    assert String.jaro_distance("shackleford", "shackelford") == 0.9696969696969697
+    assert String.jaro_distance("dunningham", "cunnigham") == 0.8962962962962964
+    assert String.jaro_distance("nichleson", "nichulson") == 0.9259259259259259
+    assert String.jaro_distance("jones", "johnson") == 0.7904761904761904
+    assert String.jaro_distance("massey", "massie") == 0.888888888888889
+    assert String.jaro_distance("abroms", "abrams") == 0.888888888888889
+    assert String.jaro_distance("hardin", "martinez") == 0.7222222222222222
+    assert String.jaro_distance("itman", "smith") == 0.4666666666666666
+    assert String.jaro_distance("jeraldine", "geraldine") == 0.9259259259259259
+    assert String.jaro_distance("michelle", "michael") == 0.8690476190476191
+    assert String.jaro_distance("julies", "julius") == 0.888888888888889
+    assert String.jaro_distance("tanya", "tonya") == 0.8666666666666667
+    assert String.jaro_distance("sean", "susan") == 0.7833333333333333
+    assert String.jaro_distance("jon", "john") == 0.9166666666666666
+    assert String.jaro_distance("jon", "jan") == 0.7777777777777777
   end
 end